Module: VariantSelection

Defined in:
app/helpers/variant_selection.rb

Instance Method Summary collapse

Instance Method Details

#options_values_combinations(product) ⇒ Object

Returns array of arrays of ids of option values, that represent all possible combinations of option _values sorted by option type position in that product.



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# File 'app/helpers/variant_selection.rb', line 5

def options_values_combinations(product)
  product.variants.map{|v| # we get all variants from product
    # then we take all option_values
    v.option_values.sort_by{|ov|
      # then sort them by position of option value in product
      ProductOptionType.find(:first, :conditions => {
          :option_type_id => ov.option_type_id,
          :product_id => product.id
        }).position
    }.map(&:id) # and get the id
  }
end

#ov_to_variant_map(product) ⇒ Object

Returns hash that maps _array of ids of option values_ to _variant attributes_,

eg.

{ [1,2,3,4] => <Variant#1> }



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# File 'app/helpers/variant_selection.rb', line 24

def ov_to_variant_map(product)
  result = {}
  product.variants.map{|v|
    # we get all variants from product
    # then we take all option_values
    key = v.option_values.sort_by{|ov|
      # then sort them by position of option value in product
      ProductOptionType.find(:first, :conditions => { :option_type_id => ov.option_type_id, :product_id => product.id }).position
    }.map(&:id)
    result[key] = v
  }
  return(result)
end

#possible_combination?(all_combinations, values) ⇒ Boolean

checks if there’s a possible combination

WARNING! This helper has equivalent on javascript side. If you plan to change it, make sure they both behave in the same way

Returns:

  • (Boolean) 


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# File 'app/helpers/variant_selection.rb', line 42

def possible_combination?(all_combinations, values)
  all_combinations.any?{|combination|
    values.enum_for(:each_with_index).all?{|v, i| combination[i] == v}
  }
end